1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // type_traits
10
11 // is_abstract
12
13 #include <type_traits>
14 #include "test_macros.h"
15
16 template <class T>
test_is_abstract()17 void test_is_abstract()
18 {
19 static_assert( std::is_abstract<T>::value, "");
20 static_assert( std::is_abstract<const T>::value, "");
21 static_assert( std::is_abstract<volatile T>::value, "");
22 static_assert( std::is_abstract<const volatile T>::value, "");
23 #if TEST_STD_VER > 14
24 static_assert( std::is_abstract_v<T>, "");
25 static_assert( std::is_abstract_v<const T>, "");
26 static_assert( std::is_abstract_v<volatile T>, "");
27 static_assert( std::is_abstract_v<const volatile T>, "");
28 #endif
29 }
30
31 template <class T>
test_is_not_abstract()32 void test_is_not_abstract()
33 {
34 static_assert(!std::is_abstract<T>::value, "");
35 static_assert(!std::is_abstract<const T>::value, "");
36 static_assert(!std::is_abstract<volatile T>::value, "");
37 static_assert(!std::is_abstract<const volatile T>::value, "");
38 #if TEST_STD_VER > 14
39 static_assert(!std::is_abstract_v<T>, "");
40 static_assert(!std::is_abstract_v<const T>, "");
41 static_assert(!std::is_abstract_v<volatile T>, "");
42 static_assert(!std::is_abstract_v<const volatile T>, "");
43 #endif
44 }
45
46 class Empty
47 {
48 };
49
50 class NotEmpty
51 {
52 virtual ~NotEmpty();
53 };
54
55 union Union {};
56
57 struct bit_zero
58 {
59 int : 0;
60 };
61
62 class Abstract
63 {
64 virtual ~Abstract() = 0;
65 };
66
67 template <class>
68 struct AbstractTemplate {
69 virtual void test() = 0;
70 };
71
72 template <>
73 struct AbstractTemplate<double> {};
74
main(int,char **)75 int main(int, char**)
76 {
77 test_is_not_abstract<void>();
78 test_is_not_abstract<int&>();
79 test_is_not_abstract<int>();
80 test_is_not_abstract<double>();
81 test_is_not_abstract<int*>();
82 test_is_not_abstract<const int*>();
83 test_is_not_abstract<char[3]>();
84 test_is_not_abstract<char[]>();
85 test_is_not_abstract<Union>();
86 test_is_not_abstract<Empty>();
87 test_is_not_abstract<bit_zero>();
88 test_is_not_abstract<NotEmpty>();
89
90 test_is_abstract<Abstract>();
91 test_is_abstract<AbstractTemplate<int> >();
92 test_is_not_abstract<AbstractTemplate<double> >();
93
94 return 0;
95 }
96